xiehe model

We divide cnc machining of precision parts into the following 4 links:

1. Face first and hole later

For parts such as shells, brackets and connecting rods, the cnc machining holes should be produced after parallel planes. In this way, the production and processing holes can be precisely positioned on the parallel planes, the positional precision of the parallel planes and the holes can be ensured, and the production and processing of the holes on the parallel planes can be facilitated.

2. CNC machining datum plane first

During the production process of parts, the outer surface that serves as the precise positioning reference should be completed by CNC machining first, so as to facilitate and better provide a precise reference for the production and processing of subsequent steps. It's called "benchmark first".

Three, smoothness cnc processing

CNC processing (such as grinding and polishing, honing, fine grinding\rolling production and processing, etc.) of the main outer surface should be carried out at the end of the processing technology planning. The roughness of the outer surface after production and processing is above Ra0.9um, slightly The impact will damage the outer surface. Generally, it is necessary to use velvet cloth to take protective measures. It is necessary to prohibit hands or other objects from directly touching the product workpiece, so as to prevent the finished surface from being damaged due to transportation and assembly between steps.

4. Distinguish between production and processing links

The outer surface of precision parts cnc processed products with high quality standards is divided into production and processing links, which can usually be divided into rough machining, semi-finish milling and finish milling. The main purpose is to ensure the quality of production and processing products; it is beneficial to the rational use of machinery and equipment; it is convenient to arrange the heat treatment process steps reasonably; and it is convenient to detect the defects of the blank as soon as possible.